Audio head unit



FIG. 1 is a perspective view of an audio head unit;

FIG. 2 is a front view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a right-side view thereof;

FIG. 5 is a left-side view thereof;

FIG. 6 is a rear view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines depict unclaimed subject matter only and form no part of the claimed design. 

The ornamental design for an audio head unit, as shown and described. 